5 Biological Hazard Organisms that might be harmful to humans Ex. Bacteria, fungi, blood,etcAvoid skin contact by wearing mask and glovesNotify your teacher if you suspect contact with material.Wash hands thoroughly
13 Electrical Possible danger from electric shock or burn Liquid spills, short circuits, exposed wires, etcDouble-check set up with teacher.Check condition of equipmentDO NOT TRY TO FIX!Notify teacher immediately
17 ChemicalChemicals that can react with and destroy tissue and other materialsBleaches, acids, and basesWear goggles, gloves, and an apronImmediately flush the affected area with water and notify your teacher
19 Toxic Substance may be poisonous if touched, inhaled, or swallowed Mercury, iodine, metal compounds, etcFollow your teacher’s instructionsAlways wash hands thoroughly after use.Go to teacher for first aid
21 No Open FlameOpen flame may ignite flammable chemicals, loose clothing, or hairEx. Alcohol, hair, clothing, etcAvoid wearing loose clothingBe aware of safety equipment locationsTie back loose hairNotify teacher immediately
22 Goggles: Eye SafetyProper eye protection should be worn at all times by anyone performing or observing science activities
23 Apron: Clothing Protection This symbol appears when substances could stain or burn clothing
24 Animal SafetyThis symbol appears when safety of animals and students must be ensured
25 RadioactivityThis symbol appears when radioactive materials are used
26 MSDS Material Safety Data Sheet A Material Safety Data Sheet (MSDS) is a document that gives detailed information about the nature of a chemical, such asphysical and chemical propertieshealth, safety, fire, and environmental hazards of a chemical product.They are designed for:workers who may be exposed to hazardous materialsemergency personnel (for example, firefighters),who may have to clean up a spill or release.
28 Hazard Diamond: On MSDS The four divisions are typically color-coded,Blue: health hazardRed: flammabilityYellow: (chemical) reactivityWhite: special codes for unique hazards.Each is rated on a scale:from 0 (no hazard; normal substance) to 4 (severe risk).